<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>数据统计</el-breadcrumb-item>
      <el-breadcrumb-item>数据报表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card class="box-card">
      <!-- 输入框位置 -->
      <!-- 2 为 ECharts 准备一个具备大小（宽高）的 DOM -->
      <div id="main" style="width: 100%;height:calc(100vh - 200px);"></div>
    </el-card>
  </div>
</template>

<script>
// 1 导入echarts
import echarts from "echarts";
import _ from "lodash";
export default {
  data: function() {
    return {
      options: {
        title: {
          text: "用户来源"
        },
        tooltip: {
          trigger: "axis",
          axisPointer: {
            type: "cross",
            label: {
              backgroundColor: "#E9EEF3"
            }
          }
        },
        grid: {
          left: "3%",
          right: "4%",
          bottom: "3%",
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: "value"
          }
        ]
      }
    };
  },
  methods: {},
  created: function() {},
  //此时页面上的元素已经渲染完毕了
  mounted: async function() {
    // 3 基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.getElementById("main"));

    const { data: res } = await this.$http.get("/reports/type/1");
    if (res.meta.status !== 200) {
      return this.$message.error("获取折线图数据失败!");
    }
    console.log(res);

    // 4 准备数据项和配置项
    const result = _.merge(res.data, this.options);

    // 5展示数据
    myChart.setOption(result);
  }
};
</script>
<style lang='less' scoped>
</style>